Flow reflects a holistic sensation that people feel when they act with total involvement [8]. Hoffman and Novak [19] defined flow as a state that is characterized by: (1) a seamless sequence of responses facilitated by machine interactivity, (2) intrinsic enjoyment, (3) a loss of selfconsciousness, and (4) self reinforcement. Flow reflects a balance between challenges and users’ skills [11]. When challenges exceed skills, users feel anxious. In contrast, when skills exceed challenges, users feel boredom. If both challenges and skills are below the threshold values, users feel apathy. When both challenges and skills exceed the threshold values and have a fit, users may experience flow.